Rifle Scopes Question - Larue QD Mounts, Use On Bolt Guns, and Return to Zero

[Monk Medic]

Hello All,

Interested in hearing the group consensus or experience with this.

I’m putting together a new, lightweight bolt gun for Appleseed, hiking and and to keep in the car.
Using the 18” SIG SSG-3000s that I recently picked up.
Rangewise it’s a 0-800 yard gun for what I have locally.

I’ve always been a Nightforce guy, and have a NF 2.5-10 x 42 NXS scope to put on it.
I usually use the Nightforce Ultralight rings but in this case I also have a Larue LT-104 (SPR 1.5) QD mount.
I was tempted to use as I like the idea of removable mount for transport or other conditions.
I’ve heard mixed reviews on the use of these on a bolt gun vs a AR platform.
Installed and set it up yesterday, zeroed it, solid groups at 100 and 300 yards, but...see below...

My questions are:

1) How repeatable is the return to zero on these mounts?
I was tempted to take it off yesterday and recheck, but the 30 degreee Maine weather told me otherwise. ;-)

2) If you don’t like the Larue, any other suggestions for a removable mount that I can use for this?

Thanks!

 

[m1match]

I have a LaRue LT 112 mount on an AR with a Leupold Mk 4 3.5-10 M3 in it and I have remounted it and observed how well it returned to zero. I found that it’s no better than +- 1/2 minute which could mean plus or minus 1/2 MOA elevation AND windage. In my opinion that is NOT good enough for a precision rifle. Now I leave that scope mounted and don’t remove it.

I also have a GDI QD mount, bought after Frank here tested them and pronounced them good to go, and I have found that they reliably return to zero. I have also used a torque wrench to remove and remount Seekins rings and a Spuhr one piece mount and they were never off by more than .1 or .2 mils when remounted.

 

[bkw1911]

I received a larue mount in trade at one point and it was garbage. Would not trust it. Like said above, I had better luck just moving seekins rings.

 

[Monk Medic]

Thanks for the feedback!
So maybe good on a gas gun, but on the bolt gun not so much.
Back to the Nightforce Ultralights then.

 

[Dthomas3523]

Spuhr makes a qd mount. Counter intuitive, but if it’s for the same gun, use the QD. If it’s for moving between rifles, just use the regular mount.

You’ll likely have to adjust the QD locks from pic rail to pic rail, thus negating the time saved with QD levers. You’ll also get a more consistent return to zero across platforms using a standard mount and torquing them each time.

 

[Monk Medic]

Just on the same rifle, my thought was to take it off for travel, or rough movement, and then reinstall at the final firing point.
Always used rings on the other bolt guns, sounds like that may be the way to go with this one as well.

Spuhr makes a qd mount. Counter intuitive, but if it’s for the same gun, use the QD. If it’s for moving between rifles, just use the regular mount.

You’ll likely have to adjust the QD locks from pic rail to pic rail, thus negating the time saved with QD levers. You’ll also get a more consistent return to zero across platforms using a standard mount and torquing them each time.

 

[Dthomas3523]

I’d give spuhr or arc qd mounts a try then. Neither company would release something they weren’t fully confident in.

I move mine across platforms, so I use the standard spuhr and re-torque in the order the screws are numbered in. As stated above, always within .1 or so mils.

 

[CBDR]

Save yourself some time and frustration. Lose the idea of moving your scope on and off. Leave it in place. Keep it simple.